jclass class_Host = env->FindClass("org/simgrid/msg/Host");
jhost_method_Host_constructor = env->GetMethodID(class_Host, "<init>", "()V");
jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");
jclass class_Host = env->FindClass("org/simgrid/msg/Host");
jhost_method_Host_constructor = env->GetMethodID(class_Host, "<init>", "()V");
jhost_field_Host_bind = jxbt_get_jfield(env,class_Host, "bind", "J");